Wrapping machine



Feb. 23, 965 F. B. ROBERTS ETAL 3,170,274

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WRAPPING MACHINE Filed Nov. 13. 1961 19 Sheets-Sheet 9 INVENTOR FRANKL/N.B. ROBERB WALTER LUCZEK Y q W- a2 Feb. 23, 1965 F. B. ROBERTS ETAL3,170,274

WRAPPING MACHINE l9 Sheets-Sheet 10 Filed Nov. 13, 1961 INVENTORSFRANKLIN .5- ROBERTS Wag-5E1? LUCZEK BY -1241 Feb. 23, 1965 F. B.ROBERTS ETAL WRAPPING MACHINE l9 Sheets-Sheet 11 Filed Nov. 13 1961INVENTORS FRANKLIN .B. ROBERTS WALTER LUCZEK Feb. 23, 1965 F.B. ROBERTSETAL 3,170,27

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INVENTORS FRANKLIN B-ROBERTS WALTER LUCZEK BY (14. w 4711M Ma-RflffiFeb. 23, 1965 I F. B. ROBERTS ETAL WRAPPING MACHINE l9 Sheets-Sheet 14Filed Nov. 13, 1961 INVENTORS WALTER LUCZEK BY awqwzew M75 Nmw FRANKLINB ROBERTS 1965 F. B. ROBERTS ETAL 3,170,274

WRAPPING MACHINE 19 Sheets-Sheet 15 Filed Nov. 13, 1961 Feb. 23, 1965 F.B. ROBERTS ETAL 3,170,274

WRAPPING MACHINE Filed Nov. 13

19 Sheets-Sheet 16 Feb. 1965 F. B. ROBERTS ETAL. 3,170,274

WRAPPING MACHINE Filed Nov. 13 1961 19 Sheets-Sheet 17 Iggy! INVENTORSFRANKL/N .B. ROBERKS WALTER LUCZEK 1965 F. B. ROBERTS ETAL 3,170,274

WRAPPING MACHINE l9 Sheets-Sheet 18 Filed Nov. 13, 1961 IN VEN TORSFRANKLIN .B ROBERTS WALTER L UC 25K 1965 F. s. ROBERTS ETAL 3,170,274

WRAPPING MACHINE Filed Nov. 13, 1961 19 Sheets-Sheet 19 INVEN TORS FRANKL/N B. ROBERTS WALTER Luczzk a +Zea! 7/8 BY a a-r. alys wrappingmachine.

3,170,274 r APPING MAQIHINE Franklin B. Roberts, Springfield, and WalterLuczclr, Inl dian Orchard, Mass, assignors to Package Machinery Company,East Longmeadow, Mass, a corporation of Massachusetts 1 Filed Nov.13,1961-, SenNo. 151,910 44'Claims. (Cl. 53-226) The present inventionrelates toimprovements in wrapping. machines ofthe type norm-allyemployed in wrapping bread, it being understood, of course, that suchmachines may also be employed in wrapping other articles.

The general object of ,thelinvention is to increase the rate at whichbread and similar articles may be wrapped.

Another objectis to minimize the maintenance and service requirementsfor such machines.

A more specific object is to provide for improved control of the wrappermaterial as it is advanced to and around the articles to be wrapped andat the same time tofacilitate the introduction of a new web of wrappingmaterial intothe machine in a minimum of time.

Another specific object is to provide improved means for obtainingregistration of printed matter on the wrapper material relative to thearticles being Wrapped.

A further object of the invention is to minimize the number ofadjustments required when changing over to wrap a different size ofarticle, and in this regard-particularly to improve the adjustment ofconveyor means for advancing articles such as sliced loaves of bread tothe In one aspect of the invention, the features of novelty arecharacterized by a wrapping machine in which linkage means are providedfor moving an elevator between positions respectively aligned withinfced and discharge platforms. Preferably the elevator is horizontallydisposed and moved along a rectilinear path.

Other aspects are characterized by the provision of means for severing aweb after it has beenpartially encircled therein by raising an elevatorfrom an infeed platform to a discharge platform. Gripper means movablewith the elevator clamp the web and position it for wrapping the nextarticle as the elevator moves baclc to the infeed' platform. The web isthereby drawn from a: web supply system during both strokes of theelevator. Where printed panels on the web are to be registered on thearticles, release of the web from the gripper means is controlled by anclectric eye mechanism.

The web supply system is characterized by means for providing asubstantial length of the web under minimum tension which is readilyavailable and facilitates its being fed during both movements of theelevator, viz as the elevator moves from the infeed platform to thedischarge platform and then back again. The web supply system is alsocharacterized by the ready manner in which various elements may bedisplaced tointroduce a new web therethrough. The web supply system isfurther characterized by the provision of means for maintainingpractically the entire length of web therein taut when the supply rolltherefor has been exhausted thereby minimi zingrthe inconvenienceofstarting a fresh supply roll.

The cross feed conveyor for delivering articles to the machine ischaracterized by the ease of its adjustment to accommodate articles ofdifferent lengths. This ad? justment' is made through the same meansthat are also employed to drive the conveyor.

The above and other relat'edobjects and features of the invention willbe apparent from a reading of the following description of thedisclosure found in the accompanying drawings and the novelty thereofpointed out in the appended claims.

United States Patent "ice 3,170,274 Patented Feb. 23, 1 965 in, section,showing the cross feed conveyor incorporated in this machine and istaken generally on lirieIII-III in FIG. 1;

FIG. 4 is a plan view of the portion of the conveyor seen in FIG. 3;

P16. 5 is an end elevation, on an enlarged scale, of conveyor drive andadjusting mechanism as viewed on lineYV in FIG. 3; I

FIG. 6 is a fragmentary view showing. the outboard end of this conveyor;

FIG. 7 is a section taken on line VII- -VH in FIG. 5;

PEG. 8' is a schematic view of the chain drive for advancing andadjusting the cross feed conveyor;

FIG. 9 is a plan view of elevator mechanism which receives loaves ofbread from the crossfeed conveyor and control mechanism associatedtherewith; this view is taken generally on line IXlX in FIG. 1 andportions have been broken away and shown in section for the sake ofclarity;

FIG. 10 is a section taken generally on line X-X in FIG. 9;

FiG. 11 is a section taken on line Xl-XI in FIG. 10;

1G. 12 is a section taken on line XII-X11 in FIG. 10;

FTG. 13 is a section taken, on an enlarged scale and with portionsbroken away, on line XIII-XIII in FIG. 12; I

1G. 14 is a section taken on 12;

FIG. 15 is a view taken on lineXV-XV in FIG. 9;

FIG. 15A is a section taken on line XVA-XVA in FIG. 9; V I

FIGf16 is a section taken on line XVI-XVI in FIG. 9;

FIG. 17 is a section taken on line XVII-XVII'ill FIG. 9;

FIG. 18 is a section taken generally on the same line as FIG. 10 but onan enlarged scale and with different portions broken away and insection;

FIG. 19 is a section, on an enlarged scale, taken generally on lineXlX-XIX in FIG. 18;

FIG. 20 is a section taken on line XXXX in FIG. 19;

FIG. 21 is a section taken on line XI.XXI in FIG. 9; HG. 22 is a sectiontaken on line XXII-XXII in FIG. 18;

FIG. 23 is a section on an enlarged scale taken on line XXIIIXXHI inFIG. 9; i

FIG. 24 is a section taken on 1ineXXIV-XXIV in FIG. 18;

FIG. 25 is an elevation, with portions removed and in section, of aportion of the web supply;

FIG. 26 is a section, on an enlarged scale, taken on line XXVEXXVI inFIG. 28;

FIG. 27 is a section, on an enlarged scale, taken on line XXVHYXVII inFIG. 28;

FIG. 28 is a plan view of the position of the web supply system seen inFIG. 25;

FIG. 29 is an elevation with portions broken away and in section of afurther portion of the web supply;

FIG. 30 is a view' similar to' FIG. 29 but taken generally on lineXXX-XXX in FIG. 31;

FIG. 31 is a view taken on line XXXIXXXI in FIG. 29;

MG. 32 is a section taken on line XXXII'-XXXII in FIG. 30.

in xiv-xiv in FIG.

General description Referring first to FIGS. 1 and 2,. the presentwrapping machine, indicated generally by reference character 40, is

5. A WRAPPING MACHINE COMPRISING A HORIZONTALLY DISPOSED INFEEDPLATFORM, A HORIZONTALLY DISPOSED DISCHARGE PLATFORM SPACED THEREABOVEAND VERTICALLY ALIGNED THEREWITH, AN ELEVATOR HAVING A FIRST POSITIONCONTIGUOUS WITH AND HORIZONTALLY ALIGNED WITH SAID INFEED PLATFORM AND ASECOND POSITION CONTIGUOUS WITH AND HORIZONTALLY ALIGNED WITH SAIDDISCHARGE PLATFORM, LINKAGE MEANS FOR MOUNTING SAID ELEVATOR AND MOVINGIT BETWEEN SAID POSITIONS ALONG A SUBSTANTIALLY RECTILINEAR PATH AND APAIR OF END FOLDERS MOUNTED ON SAID ELEVATOR, SPACED THEREABOVE ANDPROJECTING TOWARDS AND INFEED PLATFORM IN THE FIRST POSITION OF SAIDELEVATOR, AND MEANS FOR SWINGING SAID FOLDERS TO DIVERGING POSITIONSWHEN THE ELEVATOR REACHES ITS FIRST POSITION AND MEANS YIELDINGLY URGINGSAID FOLDERS TOWARDS PARALLEL POSITIONS WHEN THE ELEVATORS STARTS TOMOVE UPWARDLY FROM ITS FIRST POSITION.